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a2770e031f
This adds (somewhat hacky?) code to add a plugin label to the coredns_dns_responses_total metric. It's completely obvlious to the plugin as we just check who called the *recorder.WriteMsg method. We use runtime.Caller( 1 2 3) to get multiple levels of callers, this should be deep enough, but it depends on the dns.ResponseWriter wrapping that's occuring. README.md of metrics updates and test added in test/metrics_test.go to check for the label being set. I went through the plugin to see what metrics could be removed, but actually didn't find any, the plugin push out metrics that make sense. Due to the path fiddling to figure out the plugin name I doubt this works (out-of-the-box) for external plugins, but I haven't tested that. Signed-off-by: Miek Gieben <miek@miek.nl>
34 lines
992 B
Go
34 lines
992 B
Go
package vars
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import (
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"time"
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"github.com/coredns/coredns/request"
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)
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// Report reports the metrics data associated with request. This function is exported because it is also
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// called from core/dnsserver to report requests hitting the server that should not be handled and are thus
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// not sent down the plugin chain.
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func Report(server string, req request.Request, zone, rcode, plugin string, size int, start time.Time) {
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// Proto and Family.
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net := req.Proto()
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fam := "1"
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if req.Family() == 2 {
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fam = "2"
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}
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if req.Do() {
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RequestDo.WithLabelValues(server, zone).Inc()
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}
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qtype := qTypeString(req.QType())
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RequestCount.WithLabelValues(server, zone, net, fam, qtype).Inc()
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RequestDuration.WithLabelValues(server, zone).Observe(time.Since(start).Seconds())
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ResponseSize.WithLabelValues(server, zone, net).Observe(float64(size))
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RequestSize.WithLabelValues(server, zone, net).Observe(float64(req.Len()))
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ResponseRcode.WithLabelValues(server, zone, rcode, plugin).Inc()
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}
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